This is an interesting discussion. When is that sinking feeling a genuine warning, and when is it just a button getting pushed?
We are only aware of so much. Parts of our minds are below the level of consciousness, and many decisions are made at that level. There was a famous study, where participants were asked to click a button at the instant they made a decision, but the wires hooked up to them showed that they had already decided (hands or eyes were already moving) before they became aware of it. And our emotions are affected by our gut bacteria, of all things, and by hormones or other stimulants that reach the vagus nerve. The brain is the only source of thoughts, so these impulses arrive without thought attached to them - as feelings or impulses.
Sometimes we might ignore "facts" that we think we shouldn't believe ... say I'm walking down a darkish street, and see someone walking toward me. I might have an impulse to cross to the other side, but resist it because that would be showing distrust. It could be I'm just remembering being told that "stranger plus dark street equals bad", in which case the reaction is just a button being pushed, and may or may not be real information. After all, a dark street IS riskier than a well-lit one, so it's not a ridiculous idea. On the other hand, I may haves subconsciously observed something about the person - maybe they looked quickly around them, or moved hand into a pocket, or did something else that is a clear signal something is wrong. In this case, my "deeper" awareness picked up on something that didn't make it through the filters into conscious thought, and it would be a good idea to take precautions.
Both these feelings are similar. I'm sure other people have experienced this. I run into this all the time, because for some reason I seem to get into a lot of new things. How do YOU figure out if something is a real message, or a knee-jerk reaction? When is a new situation scary just because it's new, and when is there something going on that you can't quite put your finger on, but know it's there? How did you get to the base of it?